Which best describes the testes?

a. They produce hormones and sperm.

b. They are the male copulatrry organ.

c. They give sperm nourishment and motility.

d. They are the pouch-like skin that protects the scrotum.

Dna strands are held together by

True or false meiosis produces somatic cells like eggs and sperm cells

When there are more than two treatments in an ANOVA, rejecting the null hypothesis means that all of the treatment means are significantly different from each other. True / False.

What abiotic aspects of an ecosystem can be affected by biotic aspects? A) diseased plants from fungi B) extreme heat evaporating a stream C) heavy rain adding to soil erosion D) animals digging in the ground adding to soil erosion

Why is potassium able to diffuse easily in and out of cells? because potassium has a greater concentration in the intracellular fluid (icf) because sodium has a greater concentration in the extracellular fluid (ecf) because the resting plasma

Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds of prey, coyotes, and boBCats. Which of the following is a limiting factor for a ground squirrel population?

10. Which of the following is an emerging dis- ease that was unknown 50 years ago? a. malaria b. dengue fever C. Lyme disease d. schistosomiasis

You eat a large meal and then hike up a hill. What kind of energy transformation is your body performing? A. Chemical energy to kinetic energy and nuclear energy B. Potential energy to sound energy and nuclear energy C.

Which nervous systems balance each other to provide homeostasis?

The modern classification system is based on A - putting organisms into categories based on where they live. B - putting organisms into categories based on how they reproduce. C - putting organisms into categories based on similar characteristics.